图像库的人体姿态多重图像加密技术  

Multi-image encryption technology of human posture based on image library

作　　者：杨影 邱芬 潘舒 YANG Ying;QIU Fen;PAN Shu(Wuchang University of Technology,Wuhan 430223,China)

机构地区：[1]武昌理工学院,武汉430223

出　　处：《激光杂志》2020年第10期53-57,共5页Laser Journal

基　　金：中央高校基本科研业务费专项资金资助项目(No.2018-2y-134);湖北省教育厅青年基金项目(No.19YJC890033)。

摘　　要：为了加强传统方法运算速度和加密效果,解决加密图像解密失败而导致的无法使用问题,提出一种图像库中的人体姿态多重图像加密技术。首先通过二维的二元函数获得图像库方程矩阵,利用矩阵变换对需要加密的图像进行置乱处理;依据图像特性在平面单位正方形内设立与绘制一个猫脸图像变换,应用变换式计算过程,将图像由视觉清晰变成视觉模糊,随后进行迭代变换处理,直到图像的平面元素可以重复替换,图像达到要加密的标准位置,根据迭代变换处理本身的周期性和逆矩阵变换完成解密。通过加密安全性分析和仿真实验证明,所提技术加密效果鲁棒性较高,在25 s的限制时间内,像素点召回数量在65%和69%之间波动,且最高召回率为70%,分别高于存在同样变换矢量其他方法的40%、60%、20%。能够有效减少噪声对加密及解密结果的影响。In order to enhance the operation speed and encryption effect of traditional methods,and to solve the problem that the encrypted image cannot be used due to the failure of decryption,a multi-image encryption technology of human posture in image database is proposed.Firstly,the image library equation matrix is obtained by two-dimensional binary function,and the image to be encrypted is scrambled by matrix transformation.According to the image characteristics,a cat face image transformation is set up and drawn in flat unit square,and the image is transformed from clear vision to blurred vision by transformation calculation process,and then the iterative transformation processing is carried out until the plane elements of image could be replaced repeatedly.The image reaches standard position to be encrypted.According to the periodicity of iterative transformation processing and inverse matrix transformation,the decryption is completed.Through the analysis of encryption security and simulation experiments,it is proved that the proposed encryption technology has high robustness.Within the limit time of 25s,the number of pixel recall fluctuates between 65%and 69%,and the maximum recall rate is 70%,which is higher than 40%,60%and 20%of other methods with the same transformation vector respectively.It can effectively reduce the impact of noise on encryption and decryption results.

关 键 词：人体姿态多重图像 图像加密 图像置乱 ARNOLD变换 

分 类 号：TN919[电子电信—通信与信息系统]